Solve the Inequality $$x ^ { 2 } - 4 x + 3 \geq 0$$

Multiple Choice

Solve the inequality. Use algebra to solve the corresponding equation.
- $$x ^ { 2 } - 4 x + 3 \geq 0$$

A) $[ 3 , \infty )$
B) $( - \infty , 1 ]$
C) $[ 1,3 ]$
D) $( - \infty , 1 ] \cup [ 3 , \infty )$